The deepest infrared view of the Universe ever was just unveiled, and it's even better than we could have imagined.
In a NASA livestream, US President Joe Biden released the first official image from the James Webb Space Telescope , showing us an unprecedented new image of a region of space known as SMACS 0723 – a deep field into the distant Universe.It's the furthest back in time we've peered in the Universe to date, thanks to JWST's impressive infrared capabilities and its giant mirror.Infrared is currently the best tool we have for peering into the very distant reaches of space.
One tool for this is deep field imagery. Hubble took several deep fields, staring at a patch of sky for long stretches of time to collect the dimmest, most distant light possible. For its first deep field, Webb has peered into a patch of sky called SMACS 0723, in the southern constellation of Volans. Hubble has also obtained some observations of this region, and Webb is expected to reveal even more.SMACS 0723 is a particularly good target for this sort of observation because there are massive clusters of galaxies in the foreground.
These act like a giant cosmic magnifying glass. Because of the immense mass, their gravity causes pronounced curvature of the space-time around them, with the effect of magnifying light from more distant objects. Such gravitational lenses have previously yielded spectacularly detailed views into the distant Universe. In this image of SMACS 0723,12.5 hours of exposure time, we can see thousands of galaxies, many for the first time, including the faintest objects we've ever seen in infrared.It's s a gravitational lens, showing us the light of galaxies that are far behind the cluster in arcs around it. I tried to orient them the same. LOOK AT THE DIFFERENCE.
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